import xml.etree.ElementTree as ET
from os import getcwd
import glob
classes = ["fire","smoke"]  # 数据集类别  

def convert(size, box):
    dw = 1.0 / (size[0] )
    dh = 1.0 / (size[1] )
    x = (box[0] + box[1]) / 2.0
    y = (box[2] + box[3]) / 2.0
    w = box[1] - box[0]
    h = box[3] - box[2]
    x = x * dw
    w = w * dw
    y = y * dh
    h = h * dh
    return (x, y, w, h)

def convert_annotation(image_name):
    out_file = open('./fire_smoke/all_label/'+ image_name[:-3] + 'txt', 'w')
    # 转换后的txt文件存放路径 ,这里自己新建一个目录all_label
    f = open('./fire_smoke/Annotations/'+image_name[:-3] + 'xml',encoding='utf-8')
    # xml文件路径 
    xml_text = f.read()
    root = ET.fromstring(xml_text)
    f.close()
    size = root.find('size')
    w = int(size.find('width').text)
    h = int(size.find('height').text)
    for obj in root.iter('object'):
        cls = obj.find('name').text
        if cls not in classes:
            continue
        cls_id = classes.index(cls)
        xmlbox = obj.find('bndbox')
        b = (float(xmlbox.find('xmin').text),
             float(xmlbox.find('xmax').text),
             float(xmlbox.find('ymin').text),
             float(xmlbox.find('ymax').text))
        bb = convert((w, h), b)
        out_file.write(str(cls_id) + " ".join([str(a) for a in bb])+'\n')
wd = getcwd()
if __name__ == '__main__':
  for img_path in glob.glob("fire_smoke/JPEGImages/*.jpg"):
       # 每一张图片都对应一个xml文件这里写xml对应的图片的路径  
       image_name = img_path.split('\\')[-1]
       print(image_name)
       convert_annotation(image_name)
